Chlorosulfonated polypropylene carbonate, and production method and use thereof

Abstract

The present disclosure provides a chlorosulfonated polypropylene carbonate having a structure represented by Formula I, and the production method and use thereof in the fields of binders, stickers, coatings, and others. The present disclosure introduces a highly active chlorosulfonyl group into the molecular chain of polypropylene carbonate, the molecular weight of the final product is decreased at a different degree, and the interface compatibility of the polypropylene carbonate with various substrates can be effectively adjusted and controlled, so that the state and viscosity of the product are modified. At the same time, the chlorosulfonated polypropylene carbonate is also a fully biodegradable material.

In the claims: 
     
         1 . A chlorosulfonated polypropylene carbonate having a structure represented by Formula I, 
       
         
           
           
               
               
           
         
         wherein x is 0 or 1; y is an integer of 0-3; and m is the degree of polymerization. 
       
     
     
         2 . The chlorosulfonated polypropylene carbonate according to  claim 1 , wherein m is 10-500. 
     
     
         3 . The chlorosulfonated polypropylene carbonate according to  claim 1 , wherein the chlorosulfonated polypropylene carbonate has a number-average molecular weight of 2,000-110,000 Daltons. 
     
     
         4 . The chlorosulfonated polypropylene carbonate according to  claim 1 , wherein the chlorosulfonated polypropylene carbonate is a biodegradable material. 
     
     
         5 . A production method for chlorosulfonated polypropylene carbonate, comprising:
 subjecting polypropylene carbonate and/or chlorinated polypropylene carbonate together with a chlorosulfonation reagent to a chlorosulfonation reaction, so as to obtain the chlorosulfonated polypropylene carbonate.   
     
     
         6 . The production method according to  claim 5 , wherein the chlorosulfonation reagent comprises one or more of sulfonyl chloride, chlorosulfonic acid and sulfur dioxide gas; and the mass ratio of the polypropylene carbonate and/or chlorinated polypropylene carbonate to the chlorosulfonation reagent is 1.5:1 to 7.4:1. 
     
     
         7 . The production method according to  claim 5 , wherein the temperature for the chlorosulfonation reaction is 60-120° C.; and the time for the chlorosulfonation reaction is 20-120 min. 
     
     
         8 . The production method according to  claim 5 , wherein the raw materials for the chlorosulfonation reaction further comprise an auxiliary agent; and the mass ratio of the polypropylene carbonate and/or chlorinated polypropylene carbonate to the auxiliary agent is 20:1 to 20:4. 
     
     
         9 . The production method according to  claim 8 , wherein the auxiliary agent comprises a dispersing agent; and
 the dispersing agent comprises one or more of silica, white carbon black, calcium carbonate and talcum powder.   
     
     
         10 . The production method according to  claim 5 , wherein the production of the chlorosulfonated polypropylene carbonate is performed via a one-pot reaction. 
     
     
         11 . Use of the chlorosulfonated polypropylene carbonate according to  claim 1  in the field of adhesives, stickers or coatings.